Erratum to: The branching ratio revisitedC. Hanhart, S. Holz, B. Kubis, A. Kupść, A. Wirzba and C. W. XiaoEur. Phys. J. C, 78 6 (2018) 450DOI: https://doi.org/10.1140/epjc/s10052-018-5941-7